package cn.bugstack.config;

import cn.bugstack.types.annotations.DCCValue;
import cn.bugstack.types.common.Constants;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.redisson.api.RBucket;
import org.redisson.api.RTopic;
import org.redisson.api.RedissonClient;
import org.redisson.api.listener.MessageListener;
import org.redisson.client.RedisClient;
import org.springframework.aop.framework.AopProxyUtils;
import org.springframework.aop.support.AopUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
@Slf4j
@Configuration
public class DCCValueBeanFactory implements BeanPostProcessor {

    private static final String BASE_CONFIG_PATH = "group_by_market_dcc_";

    private final RedissonClient redissonClient;

    private final Map<String, Object> dccObjGroup = new HashMap<>();

    public DCCValueBeanFactory(RedissonClient redissonClient) {
        this.redissonClient = redissonClient;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        Class<?> targetBeanClass = bean.getClass();
        Object targetBeanObject = bean;

        if(AopUtils.isAopProxy(bean)){
            targetBeanClass = AopUtils.getTargetClass(bean);
            targetBeanObject = AopProxyUtils.getSingletonTarget(bean);
        }

        Field[] fields = targetBeanClass.getDeclaredFields();
        for (Field field : fields) {
            if(!field.isAnnotationPresent(DCCValue.class)){
                continue;
            }

            DCCValue dccValue = field.getAnnotation(DCCValue.class);

            String value = dccValue.value();
            if(StringUtils.isBlank(value)){
                throw new RuntimeException(field.getName() + " @DCCValue is not config value config case 「isSwitch/isSwitch:1」");
            }

            String[] split = value.split(":");
            String key = BASE_CONFIG_PATH.concat(split[0]);
            String defaultValue = split.length == 2? split[1] : null;

            String setValue = defaultValue;

            try{
                RBucket<String> bucket = redissonClient.getBucket(key);
                boolean exists = bucket.isExists();
                if(!exists){
                    bucket.set(defaultValue);
                }
                else {
                    setValue = bucket.get();
                }

                field.setAccessible(true);
                field.set(targetBeanObject,setValue);
                field.setAccessible(false);
            }catch (Exception e){
                throw new RuntimeException(e);
            }

            dccObjGroup.put(key,targetBeanObject);
        }
        return BeanPostProcessor.super.postProcessAfterInitialization(bean, beanName);
    }


    @Bean("dccTopic")
    public RTopic testRedisTopicListener(RedissonClient redissonClient){
        RTopic topic = redissonClient.getTopic("group_buy_market_dcc");
        topic.addListener(String.class, new MessageListener<String>() {
            @Override
            public void onMessage(CharSequence charSequence, String s) {
                String[] split = s.split(Constants.SPLIT);

                String attribute = split[0];
                String key = BASE_CONFIG_PATH.concat(attribute);
                String value = split[1];

                RBucket<Object> bucket = redissonClient.getBucket(key);
                boolean exists = bucket.isExists();
                if(!exists){
                    return;
                }
                bucket.set(value);

                Object objBean = dccObjGroup.get(key);
                if(null == objBean){
                    return;
                }

                Class<?> objBeanClass = objBean.getClass();
                if(AopUtils.isAopProxy(objBeanClass)){
                    objBeanClass = AopUtils.getTargetClass(objBeanClass);
                }

                try{
                    Field field = objBeanClass.getDeclaredField(attribute);
                    field.setAccessible(true);
                    field.set(objBean,value);
                    field.setAccessible(false);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        });

        return topic;
    }
}
